1989112 has 8 divisors (see below), whose sum is σ = 3729600. Its totient is φ = 994552.

The previous prime is 1989107. The next prime is 1989131. The reversal of 1989112 is 2119891.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124312 + ... + 124327.

It is an arithmetic number, because the mean of its divisors is an integer number (466200).

2^1989112 is an apocalyptic number.

It is an amenable number.

1989112 is a deficient number, since it is larger than the sum of its proper divisors (1740488).

1989112 is a wasteful number, since it uses less digits than its factorization.

1989112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248645 (or 248641 counting only the distinct ones).

The product of its digits is 1296, while the sum is 31.

The square root of 1989112 is about 1410.3588195917. The cubic root of 1989112 is about 125.7630551630.

The spelling of 1989112 in words is "one million, nine hundred eighty-nine thousand, one hundred twelve".